Listar las tablas que no tienen claves foranea (FK)

DECLARE @TablasConFk TABLE
(
[object_Id] int
)

INSERT @TablasConFk ( [object_Id] )
SELECT referenced_object_id
FROM sys.foreign_keys
UNION
SELECT [parent_object_id]
FROM sys.foreign_keys

SELECT name as Tabla
FROM sys.objects obj
LEFT OUTER JOIN @TablasConFk conFk ON ( obj.[object_id] = conFk.[object_Id] )
WHERE type_desc = 'USER_TABLE'
AND conFk.[object_Id] IS NULL
ORDER BY Tabla